Edge-guide for book-sewing machines



NOV- 7, HERR EDGE GUIDE FOR BOOK SEWING MACHINES Filed Aug. 22, 1931 Park A.Hcrr

Patented Nov. 7, 1933.

EDGE-GUIDE FOR BOOK-SEWING MACHINES Park A. Herr, Hillside, N. J., assignor to The Singer Manufacturing Company, Elizabeth, N. .l., a corporation of New Jersey Application August 22, 1931. Serial No. 558,757

5 Claims. (01. 112 21) This invention relates to book-sewing machines of the straight-away long stitch-length type, such as disclosed in my copending appltcation, Serial No. 558,756, filed herewith.

such a machine with an edge-guide having means to incur that the first and last stitches will be llIl the book and at safe distances from ning and ending or leading and trailin edges of the book.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of p rts hereinafter described and claimed.

The features of the invention and the advantages attained thereby will be readily understood by those skill-ed in the art from the following d iied description of a preferred embodiment of the invention illustrated in the accompanying drawing, of which Fig. 1 is a left end elevation of a book-sewing machine and edge-guide embodying the invention. Fig. 2 is a plan view of the edge-guide in working position on the bed of the machine, as shown in Fig. 1. Fig. 3 is a section on the line 3--3, Fig. 2, and Fig. 4 is a perspective View of the edge-guide.

The sewing machine to which the edge-guide is shown attached, is constructed substantially in accordance with the disclosure of my said copending application. It comprises a bed 1 and needle-bar head 2 in which are journaled the reciprocating needle-bar 3 and reciprocating rotary awl-bar l carrying, respectively, the needle 5 and awl 6. The needle passes through the needle-hole 5 in the presser-foot 7 and through the usual throat-plate 8 for cooperation with the usual shuttle 9. The book is fed to the awl and needle in long stitch-lengths preferably by means of a four-motion feed-dog 10 in cooperation with the upper walking foot 11; the work being held firmly on the throat-plate 8 by the presser-foot 7 during the return motion of the feed-dog 10 and walking foot 11. This walking foot and presser mechanism operates in the manner disclosed in my said copending application and further description thereof is believed to be unnecessary to an understanding of the present invention. It will sunice to explain that in the simultaneous descent of the awl and needle-bars, the awl 6 makes a hole in the book b. After the awl and needle rise clear of the book, the latter fed a stitch-length to carry the hole just formed to the needle 5 which, on. the next descent of the awl and needle-bars stitches through the hole formed by the previous descent of the awl the awl The invention has for an object to provide being disposed a stitch-length in advance of the needle.

The edge-guide 12 is provided primarily to insure a uniform spacing of the line of stitches 13 from the edge of the book b. The edge-guide comwith a series of screw-holes 17, any selected one of which may receive the screw 18 passing through the slot 19 in the angle-piece 20, the face 21 of which constitutes a stop against which one end of the book b is placed at the beginning of a sewing operation to insure that the first hole formed in 7 the book by the awl 6 will not be at or too near the leading edge b of the book. It is also important that the book be so positioned at starting, that the last stitch will not be taken at or too near the trailing edge b" of the book. To enable the operator to guard against misplacement of the last stitch, the top edge of the guide-bar i2 is graduated with a series of marks or notches 22 spaced a stitch-length apart; spaced from the path of the awl 6 one or more whole stitch-lengths. These graduations 22 indioate in advance of a sewing operation the points where the stitches will be made in the book. Hence, by taking care that the book is 8 not started with its trailing edge I)" too near one of the marks 22, the operator insures that the last stitch will be made at a safe distance within theedge b". Where several books of the same size are to be stitched in succession, the stop 20 may be adjusted with its face in the desired starting position intermediate the marks 22. The operator preferably starts the book so that the leading edge b overlaps the awl path the initial graduation mark 22 being the same distance d that the trailing edge I) Having thus set forth the nature of the invention, what I claim herein is:-

1. In a book-sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, and feeding mechanism,

of an edge-guide disposed alongside the line of seam-formation and graduated in stitch-lengths in advance of the needle.

2. In a book-sewing machine, the combination with stitch-fcrmin mechanism including a reciprocating needle, feeding mechanism, and an awl disposed a stitch-length in advance of said needle, of an edge-guide disposed alongside the line of seam-formation and graduated to indicate stitch-lengths in advance of said awl.

3. In a book-sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, and straightaway feeding mechanism, said stitch-forming and feeding mechanisms being adapted to sew a line of long book-fastening stitches, and means in advance of said stitch-forming mechanism graduated to indicate whole stitch-lengths in advance of said needle.

4. In a book-sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, straightaway feeding mechanism, an awl disposed a stitch-length in advance of said needle, and means for indicating at the time the first hole is formed in a book of any length within predetermined limits the point adjacent the trailing edge of the book where the last hole will be formed.

5. In a book-sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, straightaway feeding mechanism, an awl disposed a stitch-length in advance of said needle, and means for indicating in advance of a sewing operation the point adjacent the trailing edge of a. book of any length within given limits where the last stitch will be formed.

PARK A. HERR. 

